Ninja Bus 

A mythical form of stealth transport used to deposit large numbers of people at a store, pub or other public venue without any prior warning. Used primarily by retail and hospitality staff when faced with a sudden rush of customers for no apparent reason.

It's normally quiet this time of day. Where did everyone come from?
Must have been a ninja bus.

Ninja Bus by Uncle Dunkle May 9, 2018

bust out ninja skills 

to win a fight in an unorthadox yet very effective way

Did you see Matt bust out the ninja skills on Jim? I saw his brains and everything!

bust out ninja skills by Adrian Salazar May 9, 2005

ninjabustery 

1.ninja and ghost buster
2.to act like a ninja and ghost buster
3.a quality trait of being ninja and a ghost buster
or
1.a cool word to describe something/one

Dude, you are so ninjabustery!!!
Today I will begin my ninjabustery training.

ninjabustery by MasterNinja224 April 5, 2008